rAc: fix some validation issues

components/autofill/core/browser/validation.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/core/browser/validation.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 110 matching lines @@
        iter != text.end();
        ++iter) {
     if (!IsAsciiDigit(*iter))
       return false;
   }
   return true;
 }
 
 bool IsValidCreditCardSecurityCode(const base::string16& code,
                                    const base::string16& number) {
-  CreditCard card;
-  card.SetRawInfo(CREDIT_CARD_NUMBER, number);
+  std::string type = CreditCard::GetCreditCardType(number);
   size_t required_length = 3;
-  if (card.type() == kAmericanExpressCard)
+  if (type == kAmericanExpressCard)
     required_length = 4;
 
   return code.length() == required_length;
 }
 
 bool IsValidEmailAddress(const base::string16& text) {
   // E-Mail pattern as defined by the WhatWG. (4.10.7.1.5 E-Mail state)
   const base::string16 kEmailPattern = base::ASCIIToUTF16(
       "^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@"
       "[a-zA-Z0-9-]+(?:\\.[a-zA-Z0-9-]+)*$");
@@ skipping 66 matching lines @@
                                        number_string.begin() + 9),
                          &serial)
       || serial == 0) {
     return false;
   }
 
   return true;
 }
 
 }  // namespace autofill